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The RPM grid won't be any different. There's no reason to change the RPM scale. Some of the actual data in the tables will, though. Perhaps look at more than one table from the list. Also keep in mind that the factory option is factory with limits removed, as stated in the description, so it's already changed behind the scenes.
This covered the answer to your question already.
Lastly feel free to flash stage 1 and drive on it. Return to factory as if you're going to unlock, not by choosing factory from the list, and drive on that. They're not the same. If you want to learn about tuning there are plenty of resources online like HPAcademy and EFI101.